FIFOBuffer.c

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/************************************************************************************
* Copyright (C) 2020                                                               *
* TETCOS, Bangalore. India                                                         *
*                                                                                  *
* Tetcos owns the intellectual property rights in the Product and its content.     *
* The copying, redistribution, reselling or publication of any or all of the       *
* Product or its content without express prior written consent of Tetcos is        *
* prohibited. Ownership and / or any other right relating to the software and all *
* intellectual property rights therein shall remain at all times with Tetcos.      *
*                                                                                  *
* Author:    Shashi Kant Suman                                                       *
*                                                                                  *
* ---------------------------------------------------------------------------------*/
 
#include "main.h"
#include "AODV.h"
#include "List.h"
/**
This function adds a packet to the FIFO Buffer
*/
bool fn_NetSim_AODV_AddToFIFOBuffer(NetSim_PACKET* packet,
    AODV_FIFO** fifoBuffer,
    double time)
{
    AODV_FIFO* fifo = *fifoBuffer;
    while(fifo)
    {
        if(!IP_COMPARE(fifo->destination,packet->pstruNetworkData->szDestIP))
        {
            NetSim_PACKET* packetList = fifo->packetList;
            if(!fifo->packetList)
            {
                fifo->packetList = packet;
                fifo->time = time;
                return false;
            }
            while(packetList->pstruNextPacket)
                packetList = packetList->pstruNextPacket;
            packetList->pstruNextPacket = packet;
            return true;
        }
        fifo = LIST_NEXT(fifo);
    }
    fifo = FIFO_ALLOC();
    fifo->destination = IP_COPY(packet->pstruNetworkData->szDestIP);
    fifo->packetList = packet;
    fifo->time = time;
    LIST_ADD_LAST(fifoBuffer,fifo);
    return false;
}
/**
This function empties the FIFO buffer
*/
int fnEmptyFIFOBuffer(AODV_DEVICE_VAR* devVar,NETSIM_IPAddress dest)
{
    AODV_FIFO* fifo = devVar->fifo;
    while(fifo)
    {
        if(!IP_COMPARE(fifo->destination,dest))
        {
            while(fifo->packetList)
            {
                NetSim_PACKET* packet = fifo->packetList;
                fifo->packetList = packet->pstruNextPacket;
                packet->pstruNextPacket = NULL;
                fn_NetSim_Packet_FreePacket(packet);
                //Update the metrics
                AODV_METRICS_VAR(pstruEventDetails->nDeviceId).packetDropped++;
            }
            IP_FREE(fifo->destination);
            LIST_FREE(&devVar->fifo,fifo);
            break;
        }
        fifo=LIST_NEXT(fifo);
    }
    return 1;
}
/**
This function Transmits the FIFO Buffer
*/
int fn_NetSim_AODV_TransmitFIFOBuffer(AODV_DEVICE_VAR* devVar,
    NetSim_EVENTDETAILS* pstruEventDetails)
{
    NetSim_EVENTDETAILS pevent;
    AODV_FIFO* fifo = devVar->fifo;
    memcpy(&pevent,pstruEventDetails,sizeof pevent);
    while(fifo)
    {
        if(AODV_CHECK_ROUTE_FOUND(fifo->destination))
        {
            while(fifo->packetList)
            {
                NetSim_PACKET* packet = fifo->packetList;
                fifo->packetList = fifo->packetList->pstruNextPacket;
                packet->pstruNextPacket = NULL;
                pevent.dPacketSize = fnGetPacketSize(packet);
                if(packet->pstruAppData)
                {
                    pevent.nApplicationId = packet->pstruAppData->nApplicationId;
                    pevent.nSegmentId = packet->pstruAppData->nSegmentId;
                }
                pevent.nInterfaceId = 0;
                pevent.nEventType = NETWORK_OUT_EVENT;
                pevent.nPacketId = packet->nPacketId;
                pevent.nProtocolId = fn_NetSim_Stack_GetNWProtocol(pstruEventDetails->nDeviceId);
                pevent.nSubEventType = 0;
                pevent.pPacket = packet;
                pevent.szOtherDetails = NULL;
                fnpAddEvent(&pevent);
            }
        }
        fifo = (AODV_FIFO*)LIST_NEXT(fifo);
    }
    return 1;
}